// SPDX-License-Identifier: GPL-2.0-or-later /* * LASI Device Driver * * (c) Copyright 1999 Red Hat Software * Portions (c) Copyright 1999 The Puffin Group Inc. * Portions (c) Copyright 1999 Hewlett-Packard * * by Alan Cox <alan@redhat.com> and * Alex deVries <alex@onefishtwo.ca> */ #include <linux/errno.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/pm.h> #include <linux/types.h> #include <asm/io.h> #include <asm/hardware.h> #include <asm/led.h> #include "gsc.h" #define LASI_VER 0xC008 /* LASI Version */ #define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */ #define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */ static void lasi_choose_irq(struct parisc_device *dev, void *ctrl) { int irq; switch (dev->id.sversion) { case 0x74: irq = 7; break; /* Centronics */ case 0x7B: irq = 13; break; /* Audio */ case 0x81: irq = 14; break; /* Lasi itself */ case 0x82: irq = 9; break; /* SCSI */ case 0x83: irq = 20; break; /* Floppy */ case 0x84: irq = 26; break; /* PS/2 Keyboard */ case 0x87: irq = 18; break; /* ISDN */ case 0x8A: irq = 8; break; /* LAN */ case 0x8C: irq = 5; break; /* RS232 */ case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break; /* Telephone */ default: return; /* unknown */ } gsc_asic_assign_irq(ctrl, irq, &dev->irq); } static void __init lasi_init_irq(struct gsc_asic *this_lasi) { unsigned long lasi_base = this_lasi->hpa; /* Stop LASI barking for a bit */ gsc_writel(0x00000000, lasi_base+OFFSET_IMR); /* clear pending interrupts */ gsc_readl(lasi_base+OFFSET_IRR); /* We're not really convinced we want to reset the onboard * devices. Firmware does it for us... */ /* Resets */ /* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/ /* Parallel */ if(pdc_add_valid(lasi_base+0x4004) == PDC_OK) gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */ /* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/ /* Serial */ /* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/ /* SCSI */ gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */ gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */ gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */ /* Ok we hit it on the head with a hammer, our Dog is now ** comatose and muzzled. Devices will now unmask LASI ** interrupts as they are registered as irq's in the LASI range. */ /* XXX: I thought it was `awks that got `it on the `ead with an * `ammer. -- willy */ } /* ** lasi_led_init() ** ** lasi_led_init() initializes the LED controller on the LASI. ** ** Since Mirage and Electra machines use a different LED ** address register, we need to check for these machines ** explicitly. */ #ifndef CONFIG_CHASSIS_LCD_LED #define lasi_led_init(x) /* nothing */ #else static void __init lasi_led_init(unsigned long lasi_hpa) { unsigned long datareg; switch (CPU_HVERSION) { /* Gecko machines have only one single LED, which can be permanently turned on by writing a zero into the power control register. */ case 0x600: /* Gecko (712/60) */ case 0x601: /* Gecko (712/80) */ case 0x602: /* Gecko (712/100) */ case 0x603: /* Anole 64 (743/64) */ case 0x604: /* Anole 100 (743/100) */ case 0x605: /* Gecko (712/120) */ datareg = lasi_hpa + 0x0000C000; gsc_writeb(0, datareg); return; /* no need to register the LED interrupt-function */ /* Mirage and Electra machines need special offsets */ case 0x60A: /* Mirage Jr (715/64) */ case 0x60B: /* Mirage 100 */ case 0x60C: /* Mirage 100+ */ case 0x60D: /* Electra 100 */ case 0x60E: /* Electra 120 */ datareg = lasi_hpa - 0x00020000; break; default: datareg = lasi_hpa + 0x0000C000; break; } register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg); } #endif /* * lasi_power_off * * Function for lasi to turn off the power. This is accomplished by setting a * 1 to PWR_ON_L in the Power Control Register * */ static unsigned long lasi_power_off_hpa __read_mostly; static void lasi_power_off(void) { unsigned long datareg; /* calculate addr of the Power Control Register */ datareg = lasi_power_off_hpa + 0x0000C000; /* Power down the machine */ gsc_writel(0x02, datareg); } static int __init lasi_init_chip(struct parisc_device *dev) { extern void (*chassis_power_off)(void); struct gsc_asic *lasi; struct gsc_irq gsc_irq; int ret; lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); if (!lasi) return -ENOMEM; lasi->name = "Lasi"; lasi->hpa = dev->hpa.start; /* Check the 4-bit (yes, only 4) version register */ lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf; printk(KERN_INFO "%s version %d at 0x%lx found.\n", lasi->name, lasi->version, lasi->hpa); /* initialize the chassis LEDs really early */ lasi_led_init(lasi->hpa); /* Stop LASI barking for a bit */ lasi_init_irq(lasi); /* the IRQ lasi should use */ dev->irq = gsc_alloc_irq(&gsc_irq); if (dev->irq < 0) { printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); kfree(lasi); return -EBUSY; } lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); if (ret < 0) { kfree(lasi); return ret; } /* enable IRQ's for devices below LASI */ gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR); /* Done init'ing, register this driver */ ret = gsc_common_setup(dev, lasi); if (ret) { kfree(lasi); return ret; } gsc_fixup_irqs(dev, lasi, lasi_choose_irq); /* initialize the power off function */ /* FIXME: Record the LASI HPA for the power off function. This should * ensure that only the first LASI (the one controlling the power off) * should set the HPA here */ lasi_power_off_hpa = lasi->hpa; chassis_power_off = lasi_power_off; return ret; } static struct parisc_device_id lasi_tbl[] __initdata = { { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 }, { 0, } }; struct parisc_driver lasi_driver __refdata = { .name = "lasi", .id_table = lasi_tbl, .probe = lasi_init_chip, };